Apply to moist lawns and the soil temperature is above 12ºC. Immediately after application, water the grass well, this is vital to ensure the nematodes are washed down through the sward to reach the roots to where the chafer grubs are.

Make sure the lawn does not dry out after applying nematodes. Keep the lawn well watered for at least two weeks.

Reasons to choose Nemasys® Chafer Grub Killer?

Chemical Free

Children and pets can be allowed on the area immediately after treatment

Nemasys® Chafer Grub is a perishable, living product, it should be stored in the fridge until it is needed (pop in the fridge as soon as possible, they are fine on the doormat while you are at work)

Apply when the grubs are near the surface and the soil temperature is above 12ºC (54ºF), as a guide this would be April/May. Do not apply too late in the Autumn since the grubs start to move down deeper in the soil and become inactive until the following spring. However, as this move downwards is temperature dependent, in some years it may still be ok to apply later.

How does Chafer Grub Killer work?

The nematodes (Heterorhabditis bacteriophora) seek out the chafer grub and attack the pest by entering natural body openings. Once inside, they release bacteria that stops the pest from feeding, quickly killing the pest. The nematodes then reproduce inside the dead pest and release a new generation of hungry effective nematodes, which disperse and search for further prey. Maintaining moisture levels extends this reproductive period.

When should I apply Chafer Grub Killer?

Chafer grubs go through various stages in their life cycle. These stages may take more than a season to complete, its not uncommon to find populations of chafer grubs at different life stages at all times of the year, and will cause more or less damage depending on the season.Once found its best to apply a control product and follow the watering requirements.

How often should I apply Chafer Grub Killer?

We recommend that customers in high risk areas treat their lawns in April/May to prevent the build up of this pest and so reduce the risk of having to re seed the lawn at some point in the future.

It is advisable when first applied to treat the lawn for at least two seasons (spring and autumn) to reduce the population. After that it might be possible to treat as required. However, if you live in a high risk area you will be exposed to annual infection and so it may be best to treat every year as a precaution.

Are their more than one type of Chafer Grub?

Simply put, yes. The common grubs to the UK lawns are:

Common Garden Chafer - has a 1 year life cycle

Welsh Chafer - has a 2 year life cycle

Summer Chafer - has a 2 year life cycle

Cock Chafer - - has a 3-5 year life cycle

This highlights the need to identify the type of grub you have and repeat treatments annually for at least 2-3 years. Its easier to identify the adult beetle, as to correctly identify the grub, you will need a microscope and view its rear end, we have it on very good authority its the only way!

Nemasys® Leatherjacket Killer is a perishable, living product, it should be stored in the fridge until it is needed (pop in the fridge as soon as possible, they are fine on the doormat while you are at work)

When to applyWhen you see adult daddy-long-legs in your garden (towards the end of August) you will know that in a few days they will be laying eggs. These will hatch quickly; therefore aim to apply two weeks after you see the adults.

Apply to moist lawns and the soil temperature is above 12ºC which is typically late August through to the end of October. Immediately after application, water the grass well, this is vital to ensure the nematodes are washed down through the sward to reach the roots to where the Leatherjacket are.

How does LeatherJacket Killer work?

The nematodes (Steinernema feltiae), seek out the leatherjackets and attack the pest by entering natural body openings. Once inside, they release bacteria that stops the pest from feeding, quickly killing the pest. The nematodes then reproduce inside the dead pest and release a new generation of hungry infective nematodes, which disperse and search for further prey. Maintaining moisture levels extends this reproductive period.

When should I apply LeatherJacket Killer?

Leather Jackets go through various stages in their life cycle. These stages may take more than a season to complete, If treating in the Spring period, apply the nematodes at twice the recommended rate. Once found its best to apply a control product in Autumn and follow the watering requirements.

How often should I apply LeatherJacket Killer?

We recommend that customers in high risk areas treat their lawns in September/October to prevent the build up of this pest.

It is advisable to treat the lawn for at least two seasons to reduce the population. After that it might be possible not to treat every year. However, if you live in a high risk area you will be exposed to annual infection and so it may be best to treat every year as a precaution.